首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Dieting, according to an old joke, may not actually make you live longer, but it sure feels that way. Nevertheless, evidence has
Dieting, according to an old joke, may not actually make you live longer, but it sure feels that way. Nevertheless, evidence has
admin
2015-05-24
42
问题
Dieting, according to an old joke, may not actually make you live longer, but it sure feels that way. Nevertheless, evidence has been accumulating since the 1930s that calorie restriction—reducing an animal’s energy intake below its energy expenditure—extends lifespan and delays the onset of age-related diseases in rats, dogs, fish and monkeys. Such results have inspired thousandsof people to put up with constant hunger in the hope of living longer, healthier lives. They have also led to a search for drugs that mimic the effects of calorie restriction without the pain of going on an actual diet.
Amid the hype (intensive publicity), it is easy to forget that no one has until now shown that calorie restriction works in humans. That omission, however, changed this month, with the publication of the initial results of the first systematic investigation into the matter. This study, known as CALERIE (Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy), was sponsored by America’s National Institutes of Health. It took 48 men and women aged between 25 and 50 and assigned them randomly to either a control group or a calorie-restriction regime. Those in the second group were required to cut their calorie intake for six months to 75% of that needed to maintain their weight.
The CALERIE study is a landmark in the history of the field, because its subjects were either of normal weight or only slightly overweight. Previous projects have used individuals who were clinically obese, thus confusing the unquestionable benefits to health of reducing obesity with the possible advantages of calorie restriction to the otherwise healthy.
At a molecular level, CALERIE suggests these advantages are real. For example, those on restricted diets had lower insulin resistance and lower levels of low-density lipoprotein cholesterol. They showed drops in body temperature and blood-insulin levels—both phenomena that have been seen in long-lived, calorie-restricted animals. They also suffered less oxidative damage to their DNA.
Eric Ravussin, of Louisiana State University in Baton Rouge, who is one of the study’s authors, says that such results provide support for the theory that calorie restriction produces a metabolic adaptation over and above that which would be expected from weight loss alone. Nevertheless, such metabolic adaptation could be the reason why calorie restriction is associated with longer lifespans in other animals—and that is certainly the hope of those who, for the past 15 years, have been searching for ways of triggering that metabolic adaptation by means other than semi-starvation.
What makes the CALERIE study a significant one in the field?
选项
A、It used the subjects of both genders and different ages.
B、It selected people of normal weight as the subjects.
C、It rectified the misconception of dieting.
D、It was systematic in research method and based on evidence.
答案
B
解析
事实细节题,考查例证细节。第三段首句指出,CALERIE研究之所以是一座里程碑是因为选取的研究个体为体重正常或轻微偏重的个体,B项符合。
转载请注明原文地址:https://jikaoti.com/ti/FWFRFFFM
0
考研英语一
相关试题推荐
EducationChangesoftheKindergartenChildrenWehavetwosetsoftwinswhoareinfourthgradeandkindergartenataweli-
DoesEconomicRecessionandDivorceRatehaveSomethingRelated?"Ah,yes,divorce",RobinWilliamsoncemused,"fromtheL
GreenPaperEveninthiselectronicera,papercontinuestoplayacompleteroleinourdailylives.Americansdependonabo
GreenPaperEveninthiselectronicera,papercontinuestoplayacompleteroleinourdailylives.Americansdependonabo
Writeanessaywiththetitleofwhoistocarethechildren,andyouressayshouldbebasedonthefollowingoutline,youshoul
Youareinterestedinasalesmanvacancyadvertisedbyawell-knownChinesecompany,soyoudecidetowritealettertothemana
Youaregoingtoreadatextabouttheprinciplesforteachingextensivereading,followedbyalistofexamples.Choosethebes
CharlesDarwinwedhiscousinEmmaandspawned10children,includingfourbrilliantscientists.AlbertEinstein’ssecondwifeE
CharlesDarwinwedhiscousinEmmaandspawned10children,includingfourbrilliantscientists.AlbertEinstein’ssecondwifeE
Youfellillandneededanoperation.ThedoctorsofTallOaksHospitalcarriedoutanoperationonyou.Writeraletterofthan
随机试题
申述人、控告人的义务与责任不包括()
杨辉以招工为名将湖南省某县一女子蒋小琴骗至山东某县自己的一个朋友家中,欲将其卖掉,蒋小琴发现杨辉居心不良,欲逃走,被杨辉抓回。杨辉原形毕露将蒋小琴强奸。后以2万元的价格卖给了农民魏索。被害人蒋小琴苦求魏索放其回家,魏索不愿意,并且当时就拉着蒋小琴,要同蒋小
患者,男性,56岁。右腿刀刺伤后送至医院时已处于休克状态,检查发现右股动、静脉损伤出血,积极输血扩容后行右股动、静脉修补术,术程顺利,手术前后共输入同型血2600ml。术后第2天,患者自觉呼吸费力,焦虑不安,发绀,给予高流量面罩吸氧,症状无缓解。体检肺部未
对多数大型项目选址时应考虑的因素有()。
预算单位零余额账户可以办理的业务有()。
在上市公司的税后利润中,其分配顺序是()。
资料一甲公司创办于1981年,前身为全国最早的12家合资企业之一,主要生产录音磁带。在1985年转而与香港长城电子合资生产电话机。接下来的日子里,甲公司在电话、电视机、手机领域都取得了令人瞩目的成绩。2002年,甲公司手机业务销售额和利润额均做到了国产手
山地是十分重要的旅游资源,自古就有“仁者乐山”的说法。后世广为流传三山五岳。其中三山是指()。
最早的气质学说是由希腊的______提出来的。
A、Travelaloneonthecrowdedstreets.B、Travelwithabodyguardtoprotectthemselves.C、Carryanoteinthelanguageofthefo
最新回复
(
0
)